[ncl-talk] How to separated regions on a large map?

[Dennis Shea]

"Is there anything coded like this in NCL  (or R or Python) already?"

To my knowledge, NCL does not have a function that does what you want.
I doubt R does either.

Good Luck

On Fri, Jul 10, 2015 at 6:01 AM, Erik J. Schaffernicht <
eschaffe at uni-koeln.de> wrote:

> I have a 2d map where certain gridpoints have a values, all the rest are
> set to FillValue or Missing. The spatial structure of the points with
> values are not a-priori known.
> Now, I look for a function/procedure  in NCL (or maybe in R or Python, if
> those are better suited) that can tell me all the points that are part of a
> region given that at the beginning of the algorithm I provide one gridpoint
> that should be member as well.
>
> The closure or border of my region is defined by all the gridpoints that
> are FillValue or Missing and direct neighbours of the points valid values.
> On the total map there might be several such separated regions, so it is
> important to know if that I only get the indices of the region that belongs
> to my initial given grid point.
>
> Is there anything coded like this in NCL  (or R or Python) already?
>
>
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